将数组中的复选框值插入数据库

I have 3 checkboxes :

<input class="shoesChoice" name="trendy" type="checkbox" />
<input class="shoesChoice" name="luxury" type="checkbox" />
<input class="shoesChoice" name="sports" type="checkbox" />

And I want to store this information into (if possible) only one field in my database. So, if the 1rst and the last input are checked, my shoesChoice field should have : "trendy, sports"

Try to change the name and keep them in value

<input class="shoesChoice" name="shoes[]" value="trendy" type="checkbox" />
<input class="shoesChoice" name="shoes[]" value="luxury" type="checkbox" />
<input class="shoesChoice" name="shoes[]" value="sports" type="checkbox" />

In PHP, try to get values in this way:

<?php
 if(isset($_REQUEST['shoes']))
 {
   $shoes = '';
   foreach
 }

?>